Boring-tool



E. unomzia. ponme TOOL. rrucmbu min um 26. ms.

Piltented May 6, 1919.

mir. Keenan, or sraiiveiirntn, inssquax.

Be it known that I, EMIL for boring the cylinders'wi'thout the neces- ISpecification of Letters Patent.

. warranty 6, i919.

a plicati ns-a m' ee, 191a fiei'lal in. 246,918:

To all whom it may m V I I I KRO'MER, "of S ins ntyof Greene, and Statof issouri, have invented certain new and useful Im rovements'inBoringToolsmf which thefo' lowing is, a'ispecification.

This invention relates to a boring bar adapted to borethe inside ofcylinders and ,particularly air pumps and other multi-eylinder dev ces.v One of the .objectsof the inventionlS to ,providea boring'bar whichmaybe utilized sity of. disassembling the parts.

Another object of the invention is to provide a sectional operatingi'rodso that the length of the rod may befincreased or diminished, asoccasion may demand. It is also the purposeof the invention to providean improved construction er 'boring 'headg' whereby a multiplicity ofcutters may" Be" simultaneously adjusted in the head so as to haveuniform radial movements. It is also the purpose of the invention toprovide a head in which a counter-boring tool may be ap lied if desired.

ther objects and advantages of the invention will be a parenthereinafter, it beng understood t at changes in the form, proportionsand line details of construction may be resorted to without departingfrom the scope of the invention or sacrificing any of its advantages.

In the drawlngs,

Fi re 1 is a vertical longitudinal sectiona view through the cylindersof an air compressor showing the application of the invention.

Fig. 2 is a cross sectional view on the line 22 of Fig. 1.

Fig. 3 is an enlar ed through the borin hea Fig. 4 is an en view of theboring head.

ig. 5 is a sectional view on the line 5-5 of Fig. 3.

Fig. 6 is a fragmentary detail view of the counter-boring tool; and

Fig. 7 is an enlarged fragmentary longitudinal sectional viewillustrating the coupling for complementary sections of the opcratingrod.

Referring, now to the drawings by numerals of reference, 1 and 2designate tandem cylinders of an air compressed or simisectional viewlarmachine, thecylinders of which are to be bored. The cylinders areshown as connected by head 3, and are provided'with the usualpacking'glands 4 and 5. The boring tool is shown as consisting of arod-having a portion of itslengt-h indicated at 6 smooth,

and preferably of a diameter substantially equal to that of the pistonrod normally passing through the glands 4 and 5, so thatthe smoothportion 6 of the rodwill serve the purpose of centering the head and thetools carried thereby. One end of the-rod is 'threadedas at 7, thethreaded portion being shown ,as of greater diameter than" the-p01- tion6, and on the threaded portion is osinamed the headi'f o'rde'rthat the cuck may be held in its roper 'position, an abutment". ring or shoul er8is' threaded' thereon, nd a ai st whi t 9, ls t e e 'on tlie rod, isadaptedto hear." The new 9 is provided with a plurality of radial slots10 to receive the boring blades or tools 11, said tools being adapted tobe initially adjusted by the split ring consisting of themembers 12 and13 and held in the recess 14 in the head 9. By reference to Fig. 3, itwill be observed that the blades or tools 11 are provided with notches15 adapted to fit over the outstanding flanges of the rin the width ofthe notches being in excess 0 the thickness of the ring flange, so thatthe tools 11 may be moved radially in their slots. The tools are held inroper operative ositions by means of a plate 16, havin b0 ts or dowels17 which project through t e head 9 to receive the nuts 18. The centralthreaded opening 19 of the plate 17 is of greater dlameter than thediameter of the portion 6 of the rod, and within saidopen and snuglyfitting the portion 6 of the r is an exteriorly threaded expanding nut20 having a beveled face 21 bearing against corresponding faces 22 onthe inner ends of the tools 11, the recesses 23 permitting theapplication of a spanner for the purpose of screwing the nut in theopening 19. The head 9 is also provided with a recess 24 to receive acounter-boring tool 25 which may be fastened therein in any well knownmanner, so as to be readily movable when its use is not desired. Inorder to assist in aifording stability to the rod when in use, I haveprovided a yoke 26 having inturned ends 27 and 28, adapted to be securedto one of the by wj 1 g $1.9 mi 1 line with thd glands 4L and 5, aiflthgeaded thereon is a gland 32 which ma be to the yoke by thefasteningdewies33-and' 34. The threaded portion of the rod made up of anumber of sections. Forex arngle, that portion adjacent to the head mayhme restridted extension fi'fifitingin a socket 36 of a complenm tarythneaded member, and when the complementary memher is applied the twomayibe ,conpled togather: by the transverse threaded pin 3.6 (See Fig.(7,).

't'he parts are assembled, as shown in'Fig. '1, ,a drill gross, motor orother actuating device maybe coupled with the rod,

- so that its-rotating gpart'will caus a rotaiplemen ari me b Undererdinaryfiwnn t ba sed; 'I claim" In a cylinder boring device, a boringhead savin radial slots, a recessed ring in ditiona however, thesecomplementary memthehead, radially adjustable blades in the sites andhaving-notches receiving the ring, the width of the notches being inexcess of the thickness of the ring, a plate for confinblades intheslots, means for securing the plate to the head, and an expanding nutthreaded in-the plate and abs!- l gnd w a g in the en f a,

2. n a' iina'a boring device, a' boring head, a cowerplate spaced iromseeured rigidly thereto, a ltrmgi-na recess-in the head, notohed hla .esradially disposed withiethe e s r eit e p a a d the ethernotehesrece'lynig edge ofthe rlng,

and an expanding nut for imparting radial lnig fel'llelflll to saidbladeisfi a he or oingg ,s e0" cation signer at .Springfieldf Missourithis 16 day of April,

. W, sae xrpman,

JOHN I Correction in Letters Patent No. 1,303,071.

It is hereby certified that in Letters Patent No. 1,303,071, granted May6, 1919,

, upon the application of Emil Kromer, of Springfield, Missouri, for animprovement in Boring-Tools, an error appears in the printedspecification requiring correction as follows: Page 2, lines 53-54, dateof execution, for 16 day of April 1908 read 16 day of April, 1918; andthat the said Letters Patent should be read with this correction thereinthat the same may conform to the record of the case in the PatentOffiee.

Signed and sealed this 17th day of June, A. D., 1919.

[SEAL] J. T. NEWTON,

G'ommissz'oner of Patents

